Full sample, regardless of filters.
Group A — paired t-test n=20
Mean change -15.20 mmHg
[95% CI -16.59, -13.81]
t(19) = -22.91 · p < 0.0001 · d_z = -5.12 (very large)
Group B — paired t-test n=19
Mean change -4.74 mmHg
[95% CI -5.93, -3.55]
t(18) = -8.36 · p < 0.0001 · d_z = -1.92 (very large)
Between groups (Welch t-test on changes) A − B
Mean difference -10.46 mmHg
[95% CI -12.23, -8.69]
t(36.4) = -12.00 · p < 0.0001 · Hedges g = -3.75 (very large)
ANCOVA (baseline-adjusted) Post ~ Baseline + Group
Adjusted A vs B effect -10.56 mmHg
[95% CI -12.05, -9.07]
p < 0.0001 · baseline coef = 0.26 (Post per +1 mmHg baseline)